Make osmo_pfcp_enc_to_str_outer_header_creation() as
osmo_pfcp_ie_outer_header_creation_to_str_*() functions.
Used by I0d4d9edcfc94b61bdc74cfd4ff837f151d1c28ae (osmo-upf)
Change-Id: I4ad1570485c8081b82284e4e6b4de4d7eed414b0
Move static function ip_addrs_to_str_buf() to public API as
osmo_pfcp_ip_addrs_to_str_buf() and osmo_pfcp_ip_addrs_to_str_c().
So far the static function was only used in places where it follows
other strings, so that it made sense to always start with a comma. Move
this comma out of the function to the callers.
Sensibly handle a NULL pointer and an empty address set.
Rationale: osmo-upf would like to print an osmo_pfcp_ip_addrs struct in
logging.
Change-Id: I5f67db8d347690cbb1ce273a2d072636859f1bf6
So far we had only osmo_pfcp_enc_to_str_node_id(), used for PFCP message
to string conversion. It behaves like a common _to_str_buf() function,
but has an inconvenient void* arg (for use with libosmo-tlv).
Implement the string conversion as common _to_str_buf() and _to_str_c()
functions, and call that from osmo_pfcp_enc_to_str_node_id(). That's
useful for log messages coming up in a subsequent patch.
Related: SYS#5599
Change-Id: I5c580bc510afce58a03dea0861db9630b063b2ae
Neels Hofmeyr